The height of the flagpole

Group blonde-female university was given the task to measure the height of the flagpole.
Typing with them ladders and tape measures, they went to the flagpole and began to measure it, falling from ladders, dropping roulette and generally creating a terrible mess.

A passing engineering student, determined to help, went to him, took the flag pole out of the ground, placed on the ground, measure it with a tape measure, and transmits the measurement result blondes have gone home. Blonde looked at each other, laughed and one said to the other:
 - Well, as always, these engineers are too stupid to me. We need height, and he measured the length of the ...